DEVICE FOR ENTRANCE CONTROL BY USING INTER-PHONE AND CONTROL METHOD THEREOF

摘要

PURPOSE: A device and a method for entrance control by using an inter-phone are provided to reinforce the security function by blocking the calling to the outside via an inter-phone or opening a door by using an external phone not but an internal phone. CONSTITUTION: A device for entrance control by using an inter-phone includes an inter-phone(10) mounted outside a door, an indoor switchboard(50), a door control unit(30) mounted between the inter-phone and the indoor switchboard, internal phones(70), and a door electronic opening/closing unit(90). The door control unit receives a door opening code input from the internal phones to control the opening/closing of the door, and automatically blocks inter-phone network(15) when a telephone number input to the inter-phone is an external phone number or when the inter-phone is called by an external phone.